Rotational echo double-resonance NMR

Figure 5.6 Steric view of sickle structure of D-Glu-8 (1) in helical fibers based upon measurements made using rotational echo double-resonance NMR experiments. The N-C3 torsion angle (>Iy) is —100°, while the C1-C4 torsion angle (>I 4) is —53°. Reprinted from Ref. 40 with permission of The Royal Society of Chemistry on behalf of PCCP Owner Societies. 

Wooley KL, Klug CA, Tasaki K, Schaefer J. Shapes of dendrimers fi om rotational-echo double-resonance NMR. J Am Chem Soc 1997 119 53-58. 

Rotational-echo double resonance NMR Tetramethyl bisphenol A polycarbonate Tetrachlorophthalic dimethyl ester Wiliams, Landel, Ferry... 

REDOR rotational echo double resonance (NMR spectroscopy)... 

Paik, Y., Yang, C., Metaferia, B., el al. (2007) Rotational-echo double-resonance NMR distance measurements for the tubulin-bound paclitaxel conformation, J. Am. Chem. Soc., 129, 361-370. 

T. Gullion and J. Schaefer, Rotational-echo double-resonance NMR. J. Magn. Reson., 1989, 81, 196-200. 

Gullion T (1998) Introduction to rotational-echo, double-resonance NMR. Concepts Magn Reson 10 277-289... 

S. Elbers, W. Stroiek, L. Koudelka, H. Eckert, Site connectivities in silver borophosphate glasses new results from B P and P B rotational echo double resonance NMR spectroscopy, Solid State Nucl. Magn. Reson. 27 (2005) 65-76. 

Only the longitudinal spin term is present in Eq. (14) and aU heteronuclear dipole-dipole coupling interactions commute in a multispin system making the analysis much more straightforward. One of the best known pulse sequences in solid-state NMR spectroscopy, the rotational-echo double-resonance NMR (REDOR) experiment [44], employs appropriately placed pulses to avoid averaging of the heteronuclear dipolar coupling interactions by MAS. REDOR has been used in numerous cases to extract precise dipolar couplings and the inventor. Prof Schaefer, was commemorated recently for his contributions to solid-state NMR spectroscopy [45]. 

T. Gullion, Rotational-Echo, Double-Resonance NMR , in Modern Magnetic Resonance, Part 1, ed. G. A. Webb, Springer, Dordrecht, Netherlands, 2006, p. 709. 

Holland et used rotational-echo double-resonance NMR to probe the proximity of Cs" network modifiers to network-forming boron in binary cesium borate glasses. Low- and high-alkali glasses show distinctly different dephasing curves, which indicate preferential association of Cs with four-co-ordinate boron (B-[4]) at low-alkali contents only. Different B-[4] sites within a given glass appear to be subject to the same Cs dipolar field, thus... 

Watts JA, Watts A, Middleton DA. A model of reversible inhibitors in the gastric H /K -ATPase binding site determined by rotational echo double resonance NMR. J. Biol. Chem. 2001 276 43197-43204. 

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